blob: dd895c409ca328464263a7985622b526546db6ba [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 *
5 * DRM core CRTC related functions
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
16 *
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23 * OF THIS SOFTWARE.
24 *
25 * Authors:
26 * Keith Packard
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
30 */
31
Sergei Antonovba6f5822014-05-12 00:30:48 +020032#include <linux/kernel.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040033#include <linux/export.h>
Paul Gortmaker0603ba12011-08-31 11:29:09 -040034#include <linux/moduleparam.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040035
David Howells760285e2012-10-02 18:01:07 +010036#include <drm/drmP.h>
Daniel Vetter321ebf02014-11-04 22:57:27 +010037#include <drm/drm_atomic.h>
David Howells760285e2012-10-02 18:01:07 +010038#include <drm/drm_crtc.h>
39#include <drm/drm_fourcc.h>
40#include <drm/drm_crtc_helper.h>
41#include <drm/drm_fb_helper.h>
Daniel Vetter2f324b42014-10-29 11:13:47 +010042#include <drm/drm_plane_helper.h>
Daniel Vetter321ebf02014-11-04 22:57:27 +010043#include <drm/drm_atomic_helper.h>
David Howells760285e2012-10-02 18:01:07 +010044#include <drm/drm_edid.h>
Dave Airlief453ba02008-11-07 14:05:41 -080045
Daniel Vetter3150c7d2014-11-06 20:53:29 +010046/**
47 * DOC: overview
48 *
49 * The CRTC modeset helper library provides a default set_config implementation
50 * in drm_crtc_helper_set_config(). Plus a few other convenience functions using
51 * the same callbacks which drivers can use to e.g. restore the modeset
52 * configuration on resume with drm_helper_resume_force_mode().
53 *
54 * The driver callbacks are mostly compatible with the atomic modeset helpers,
55 * except for the handling of the primary plane: Atomic helpers require that the
56 * primary plane is implemented as a real standalone plane and not directly tied
57 * to the CRTC state. For easier transition this library provides functions to
58 * implement the old semantics required by the CRTC helpers using the new plane
59 * and atomic helper callbacks.
60 *
61 * Drivers are strongly urged to convert to the atomic helpers (by way of first
62 * converting to the plane helpers). New drivers must not use these functions
63 * but need to implement the atomic interface instead, potentially using the
64 * atomic helpers for that.
65 */
Daniel Vetter92b6f892013-10-08 17:44:47 +020066MODULE_AUTHOR("David Airlie, Jesse Barnes");
67MODULE_DESCRIPTION("DRM KMS helper");
68MODULE_LICENSE("GPL and additional rights");
69
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +010070/**
71 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the
72 * connector list
73 * @dev: drm device to operate on
74 *
75 * Some userspace presumes that the first connected connector is the main
76 * display, where it's supposed to display e.g. the login screen. For
77 * laptops, this should be the main panel. Use this function to sort all
78 * (eDP/LVDS) panels to the front of the connector list, instead of
79 * painstakingly trying to initialize them in the right order.
80 */
Daniel Vettercfc1a062012-10-27 15:52:04 +020081void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
82{
83 struct drm_connector *connector, *tmp;
84 struct list_head panel_list;
85
86 INIT_LIST_HEAD(&panel_list);
87
88 list_for_each_entry_safe(connector, tmp,
89 &dev->mode_config.connector_list, head) {
90 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
91 connector->connector_type == DRM_MODE_CONNECTOR_eDP)
92 list_move_tail(&connector->head, &panel_list);
93 }
94
95 list_splice(&panel_list, &dev->mode_config.connector_list);
96}
97EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
98
Dave Airlief453ba02008-11-07 14:05:41 -080099/**
Keith Packardc9fb15f2009-05-30 20:42:28 -0700100 * drm_helper_encoder_in_use - check if a given encoder is in use
101 * @encoder: encoder to check
102 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100103 * Checks whether @encoder is with the current mode setting output configuration
104 * in use by any connector. This doesn't mean that it is actually enabled since
105 * the DPMS state is tracked separately.
Keith Packardc9fb15f2009-05-30 20:42:28 -0700106 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100107 * Returns:
108 * True if @encoder is used, false otherwise.
Keith Packardc9fb15f2009-05-30 20:42:28 -0700109 */
110bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
111{
112 struct drm_connector *connector;
113 struct drm_device *dev = encoder->dev;
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100114
Sergei Antonovba6f5822014-05-12 00:30:48 +0200115 /*
116 * We can expect this mutex to be locked if we are not panicking.
117 * Locking is currently fubar in the panic handler.
118 */
Dave Airlie8d4ad9d2014-06-05 20:28:59 +1000119 if (!oops_in_progress) {
Sergei Antonovba6f5822014-05-12 00:30:48 +0200120 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
Dave Airlie8d4ad9d2014-06-05 20:28:59 +1000121 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
122 }
Sergei Antonovba6f5822014-05-12 00:30:48 +0200123
Keith Packardc9fb15f2009-05-30 20:42:28 -0700124 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
125 if (connector->encoder == encoder)
126 return true;
127 return false;
128}
129EXPORT_SYMBOL(drm_helper_encoder_in_use);
130
131/**
Dave Airlief453ba02008-11-07 14:05:41 -0800132 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
133 * @crtc: CRTC to check
134 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100135 * Checks whether @crtc is with the current mode setting output configuration
136 * in use by any connector. This doesn't mean that it is actually enabled since
137 * the DPMS state is tracked separately.
Dave Airlief453ba02008-11-07 14:05:41 -0800138 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100139 * Returns:
140 * True if @crtc is used, false otherwise.
Dave Airlief453ba02008-11-07 14:05:41 -0800141 */
142bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
143{
144 struct drm_encoder *encoder;
145 struct drm_device *dev = crtc->dev;
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100146
Sergei Antonovba6f5822014-05-12 00:30:48 +0200147 /*
148 * We can expect this mutex to be locked if we are not panicking.
149 * Locking is currently fubar in the panic handler.
150 */
151 if (!oops_in_progress)
152 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
153
Dave Airlief453ba02008-11-07 14:05:41 -0800154 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700155 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
Dave Airlief453ba02008-11-07 14:05:41 -0800156 return true;
157 return false;
158}
159EXPORT_SYMBOL(drm_helper_crtc_in_use);
160
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000161static void
162drm_encoder_disable(struct drm_encoder *encoder)
163{
164 struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
165
Sean Paul3b336ec2013-08-14 16:47:37 -0400166 if (encoder->bridge)
167 encoder->bridge->funcs->disable(encoder->bridge);
168
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000169 if (encoder_funcs->disable)
170 (*encoder_funcs->disable)(encoder);
171 else
172 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
Sean Paul3b336ec2013-08-14 16:47:37 -0400173
174 if (encoder->bridge)
175 encoder->bridge->funcs->post_disable(encoder->bridge);
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000176}
177
Daniel Vetterb182cc52014-03-20 14:26:34 +0100178static void __drm_helper_disable_unused_functions(struct drm_device *dev)
Dave Airlief453ba02008-11-07 14:05:41 -0800179{
180 struct drm_encoder *encoder;
Dave Airlief453ba02008-11-07 14:05:41 -0800181 struct drm_crtc *crtc;
182
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100183 drm_warn_on_modeset_not_all_locked(dev);
184
Dave Airlief453ba02008-11-07 14:05:41 -0800185 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
Dave Airlie929710212010-12-21 12:47:56 +1000186 if (!drm_helper_encoder_in_use(encoder)) {
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000187 drm_encoder_disable(encoder);
Rob Clarkb5e6c1d2014-05-24 14:30:10 -0400188 /* disconnect encoder from any connector */
Dave Airlie9c552dd2009-09-02 14:00:11 +1000189 encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000190 }
Dave Airlief453ba02008-11-07 14:05:41 -0800191 }
192
193 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
194 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
195 crtc->enabled = drm_helper_crtc_in_use(crtc);
196 if (!crtc->enabled) {
Alex Deucher5c8d7172010-06-11 17:04:35 -0400197 if (crtc_funcs->disable)
198 (*crtc_funcs->disable)(crtc);
199 else
200 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
Matt Roperf4510a22014-04-01 15:22:40 -0700201 crtc->primary->fb = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800202 }
203 }
204}
Daniel Vetterb182cc52014-03-20 14:26:34 +0100205
206/**
207 * drm_helper_disable_unused_functions - disable unused objects
208 * @dev: DRM device
209 *
210 * This function walks through the entire mode setting configuration of @dev. It
211 * will remove any crtc links of unused encoders and encoder links of
212 * disconnected connectors. Then it will disable all unused encoders and crtcs
213 * either by calling their disable callback if available or by calling their
214 * dpms callback with DRM_MODE_DPMS_OFF.
215 */
216void drm_helper_disable_unused_functions(struct drm_device *dev)
217{
218 drm_modeset_lock_all(dev);
219 __drm_helper_disable_unused_functions(dev);
220 drm_modeset_unlock_all(dev);
221}
Dave Airlief453ba02008-11-07 14:05:41 -0800222EXPORT_SYMBOL(drm_helper_disable_unused_functions);
223
Jesse Barnes7bec7562009-02-23 16:09:34 -0800224/*
225 * Check the CRTC we're going to map each output to vs. its current
226 * CRTC. If they don't match, we have to disable the output and the CRTC
227 * since the driver will have to re-route things.
228 */
229static void
230drm_crtc_prepare_encoders(struct drm_device *dev)
231{
232 struct drm_encoder_helper_funcs *encoder_funcs;
233 struct drm_encoder *encoder;
234
235 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
236 encoder_funcs = encoder->helper_private;
237 /* Disable unused encoders */
238 if (encoder->crtc == NULL)
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000239 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800240 /* Disable encoders whose CRTC is about to change */
241 if (encoder_funcs->get_crtc &&
242 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000243 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800244 }
245}
246
Dave Airlief453ba02008-11-07 14:05:41 -0800247/**
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100248 * drm_crtc_helper_set_mode - internal helper to set a mode
Dave Airlief453ba02008-11-07 14:05:41 -0800249 * @crtc: CRTC to program
250 * @mode: mode to use
Alex Deucher4c9287c2012-11-09 17:26:32 +0000251 * @x: horizontal offset into the surface
252 * @y: vertical offset into the surface
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100253 * @old_fb: old framebuffer, for cleanup
Dave Airlief453ba02008-11-07 14:05:41 -0800254 *
Dave Airlief453ba02008-11-07 14:05:41 -0800255 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100256 * to fixup or reject the mode prior to trying to set it. This is an internal
257 * helper that drivers could e.g. use to update properties that require the
258 * entire output pipe to be disabled and re-enabled in a new configuration. For
259 * example for changing whether audio is enabled on a hdmi link or for changing
260 * panel fitter or dither attributes. It is also called by the
261 * drm_crtc_helper_set_config() helper function to drive the mode setting
262 * sequence.
Dave Airlief453ba02008-11-07 14:05:41 -0800263 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100264 * Returns:
265 * True if the mode was set successfully, false otherwise.
Dave Airlief453ba02008-11-07 14:05:41 -0800266 */
267bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
268 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500269 int x, int y,
270 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800271{
272 struct drm_device *dev = crtc->dev;
Daniel Stone5a275282015-03-19 04:33:03 +0000273 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800274 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
275 struct drm_encoder_helper_funcs *encoder_funcs;
276 int saved_x, saved_y;
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400277 bool saved_enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800278 struct drm_encoder *encoder;
279 bool ret = true;
280
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100281 drm_warn_on_modeset_not_all_locked(dev);
282
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400283 saved_enabled = crtc->enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800284 crtc->enabled = drm_helper_crtc_in_use(crtc);
Dave Airlief453ba02008-11-07 14:05:41 -0800285 if (!crtc->enabled)
286 return true;
287
Chris Wilson021a8452011-01-28 11:31:56 +0000288 adjusted_mode = drm_mode_duplicate(dev, mode);
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400289 if (!adjusted_mode) {
290 crtc->enabled = saved_enabled;
Ville Syrjälä6bfc56a2012-03-13 12:35:48 +0200291 return false;
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400292 }
Chris Wilson021a8452011-01-28 11:31:56 +0000293
Dave Airlief453ba02008-11-07 14:05:41 -0800294 saved_mode = crtc->mode;
Daniel Stone5a275282015-03-19 04:33:03 +0000295 saved_hwmode = crtc->hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800296 saved_x = crtc->x;
297 saved_y = crtc->y;
298
299 /* Update crtc values up front so the driver can rely on them for mode
300 * setting.
301 */
302 crtc->mode = *mode;
303 crtc->x = x;
304 crtc->y = y;
305
Dave Airlief453ba02008-11-07 14:05:41 -0800306 /* Pass our mode to the connectors and the CRTC to give them a chance to
307 * adjust it according to limitations or connector properties, and also
308 * a chance to reject the mode entirely.
309 */
310 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
311
312 if (encoder->crtc != crtc)
313 continue;
Sean Paul3b336ec2013-08-14 16:47:37 -0400314
315 if (encoder->bridge && encoder->bridge->funcs->mode_fixup) {
316 ret = encoder->bridge->funcs->mode_fixup(
317 encoder->bridge, mode, adjusted_mode);
318 if (!ret) {
319 DRM_DEBUG_KMS("Bridge fixup failed\n");
320 goto done;
321 }
322 }
323
Dave Airlief453ba02008-11-07 14:05:41 -0800324 encoder_funcs = encoder->helper_private;
325 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
326 adjusted_mode))) {
Adam Jackson836e53d2011-10-10 16:21:27 -0400327 DRM_DEBUG_KMS("Encoder fixup failed\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800328 goto done;
329 }
330 }
331
332 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
Adam Jackson836e53d2011-10-10 16:21:27 -0400333 DRM_DEBUG_KMS("CRTC fixup failed\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800334 goto done;
335 }
Jerome Glisse94401062010-07-15 15:43:25 -0400336 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800337
Daniel Stone5a275282015-03-19 04:33:03 +0000338 crtc->hwmode = *adjusted_mode;
339
Dave Airlief453ba02008-11-07 14:05:41 -0800340 /* Prepare the encoders and CRTCs before setting the mode. */
341 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
342
343 if (encoder->crtc != crtc)
344 continue;
Sean Paul3b336ec2013-08-14 16:47:37 -0400345
346 if (encoder->bridge)
347 encoder->bridge->funcs->disable(encoder->bridge);
348
Dave Airlief453ba02008-11-07 14:05:41 -0800349 encoder_funcs = encoder->helper_private;
350 /* Disable the encoders as the first thing we do. */
351 encoder_funcs->prepare(encoder);
Sean Paul3b336ec2013-08-14 16:47:37 -0400352
353 if (encoder->bridge)
354 encoder->bridge->funcs->post_disable(encoder->bridge);
Dave Airlief453ba02008-11-07 14:05:41 -0800355 }
356
Jesse Barnes7bec7562009-02-23 16:09:34 -0800357 drm_crtc_prepare_encoders(dev);
358
Dave Airlief453ba02008-11-07 14:05:41 -0800359 crtc_funcs->prepare(crtc);
360
361 /* Set up the DPLL and any encoders state that needs to adjust or depend
362 * on the DPLL.
363 */
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000364 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
365 if (!ret)
366 goto done;
Dave Airlief453ba02008-11-07 14:05:41 -0800367
368 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
369
370 if (encoder->crtc != crtc)
371 continue;
372
Jerome Glisse94401062010-07-15 15:43:25 -0400373 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
Jani Nikula83a8cfd2014-06-03 14:56:22 +0300374 encoder->base.id, encoder->name,
Jerome Glisse94401062010-07-15 15:43:25 -0400375 mode->base.id, mode->name);
Dave Airlief453ba02008-11-07 14:05:41 -0800376 encoder_funcs = encoder->helper_private;
377 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
Sean Paul3b336ec2013-08-14 16:47:37 -0400378
379 if (encoder->bridge && encoder->bridge->funcs->mode_set)
380 encoder->bridge->funcs->mode_set(encoder->bridge, mode,
381 adjusted_mode);
Dave Airlief453ba02008-11-07 14:05:41 -0800382 }
383
384 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
385 crtc_funcs->commit(crtc);
386
387 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
388
389 if (encoder->crtc != crtc)
390 continue;
391
Sean Paul3b336ec2013-08-14 16:47:37 -0400392 if (encoder->bridge)
393 encoder->bridge->funcs->pre_enable(encoder->bridge);
394
Dave Airlief453ba02008-11-07 14:05:41 -0800395 encoder_funcs = encoder->helper_private;
396 encoder_funcs->commit(encoder);
397
Sean Paul3b336ec2013-08-14 16:47:37 -0400398 if (encoder->bridge)
399 encoder->bridge->funcs->enable(encoder->bridge);
Dave Airlief453ba02008-11-07 14:05:41 -0800400 }
401
Mario Kleiner27641c32010-10-23 04:20:23 +0200402 /* Calculate and store various constants which
403 * are later needed by vblank and swap-completion
404 * timestamping. They are derived from true hwmode.
405 */
Ville Syrjälä545cdd52013-10-26 17:16:30 +0300406 drm_calc_timestamping_constants(crtc, &crtc->hwmode);
Mario Kleiner27641c32010-10-23 04:20:23 +0200407
Dave Airlief453ba02008-11-07 14:05:41 -0800408 /* FIXME: add subpixel order */
409done:
Chris Wilson021a8452011-01-28 11:31:56 +0000410 drm_mode_destroy(dev, adjusted_mode);
Dave Airlief453ba02008-11-07 14:05:41 -0800411 if (!ret) {
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400412 crtc->enabled = saved_enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800413 crtc->mode = saved_mode;
Daniel Stone5a275282015-03-19 04:33:03 +0000414 crtc->hwmode = saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800415 crtc->x = saved_x;
416 crtc->y = saved_y;
417 }
418
419 return ret;
420}
421EXPORT_SYMBOL(drm_crtc_helper_set_mode);
422
Thierry Redinga74591d2014-04-29 11:44:39 +0200423static void
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000424drm_crtc_helper_disable(struct drm_crtc *crtc)
425{
426 struct drm_device *dev = crtc->dev;
427 struct drm_connector *connector;
428 struct drm_encoder *encoder;
429
430 /* Decouple all encoders and their attached connectors from this crtc */
431 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
432 if (encoder->crtc != crtc)
433 continue;
434
435 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
436 if (connector->encoder != encoder)
437 continue;
438
439 connector->encoder = NULL;
Thierry Redinga6ad6232013-10-02 15:50:06 +0200440
441 /*
442 * drm_helper_disable_unused_functions() ought to be
443 * doing this, but since we've decoupled the encoder
444 * from the connector above, the required connection
445 * between them is henceforth no longer available.
446 */
447 connector->dpms = DRM_MODE_DPMS_OFF;
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000448 }
449 }
450
Daniel Vetterb182cc52014-03-20 14:26:34 +0100451 __drm_helper_disable_unused_functions(dev);
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000452}
453
Dave Airlief453ba02008-11-07 14:05:41 -0800454/**
455 * drm_crtc_helper_set_config - set a new config from userspace
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100456 * @set: mode set configuration
Dave Airlief453ba02008-11-07 14:05:41 -0800457 *
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100458 * Setup a new configuration, provided by the upper layers (either an ioctl call
Masanari Iidae2278672014-02-18 22:54:36 +0900459 * from userspace or internally e.g. from the fbdev support code) in @set, and
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100460 * enable it. This is the main helper functions for drivers that implement
461 * kernel mode setting with the crtc helper functions and the assorted
462 * ->prepare(), ->modeset() and ->commit() helper callbacks.
Dave Airlief453ba02008-11-07 14:05:41 -0800463 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100464 * Returns:
465 * Returns 0 on success, negative errno numbers on failure.
Dave Airlief453ba02008-11-07 14:05:41 -0800466 */
467int drm_crtc_helper_set_config(struct drm_mode_set *set)
468{
469 struct drm_device *dev;
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400470 struct drm_crtc *new_crtc;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200471 struct drm_encoder *save_encoders, *new_encoder, *encoder;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100472 bool mode_changed = false; /* if true do a full mode set */
473 bool fb_changed = false; /* if true and !mode_changed just do a flip */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200474 struct drm_connector *save_connectors, *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800475 int count = 0, ro, fail = 0;
476 struct drm_crtc_helper_funcs *crtc_funcs;
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800477 struct drm_mode_set save_set;
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200478 int ret;
Keith Packardbf9dc102010-11-26 10:45:58 -0800479 int i;
Dave Airlief453ba02008-11-07 14:05:41 -0800480
Zhao Yakui58367ed2009-07-20 13:48:07 +0800481 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800482
Daniel Vettere58de882013-06-15 00:13:11 +0200483 BUG_ON(!set);
484 BUG_ON(!set->crtc);
485 BUG_ON(!set->crtc->helper_private);
Dave Airlief453ba02008-11-07 14:05:41 -0800486
Daniel Vettere58de882013-06-15 00:13:11 +0200487 /* Enforce sane interface api - has been abused by the fb helper. */
488 BUG_ON(!set->mode && set->fb);
489 BUG_ON(set->fb && set->num_connectors == 0);
Dave Airlief453ba02008-11-07 14:05:41 -0800490
491 crtc_funcs = set->crtc->helper_private;
492
Chris Wilsonede3ff52011-01-31 11:16:33 +0000493 if (!set->mode)
494 set->fb = NULL;
495
Jerome Glisse94401062010-07-15 15:43:25 -0400496 if (set->fb) {
497 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
498 set->crtc->base.id, set->fb->base.id,
499 (int)set->num_connectors, set->x, set->y);
500 } else {
Chris Wilsonede3ff52011-01-31 11:16:33 +0000501 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
Thierry Redinga74591d2014-04-29 11:44:39 +0200502 drm_crtc_helper_disable(set->crtc);
503 return 0;
Jerome Glisse94401062010-07-15 15:43:25 -0400504 }
Dave Airlief453ba02008-11-07 14:05:41 -0800505
506 dev = set->crtc->dev;
507
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100508 drm_warn_on_modeset_not_all_locked(dev);
509
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400510 /*
511 * Allocate space for the backup of all (non-pointer) encoder and
512 * connector data.
513 */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200514 save_encoders = kzalloc(dev->mode_config.num_encoder *
515 sizeof(struct drm_encoder), GFP_KERNEL);
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400516 if (!save_encoders)
Dave Airlief453ba02008-11-07 14:05:41 -0800517 return -ENOMEM;
Dave Airlief453ba02008-11-07 14:05:41 -0800518
Maarten Maathuise67aae72009-08-27 10:18:29 +0200519 save_connectors = kzalloc(dev->mode_config.num_connector *
520 sizeof(struct drm_connector), GFP_KERNEL);
521 if (!save_connectors) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200522 kfree(save_encoders);
523 return -ENOMEM;
524 }
525
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400526 /*
527 * Copy data. Note that driver private data is not affected.
Maarten Maathuise67aae72009-08-27 10:18:29 +0200528 * Should anything bad happen only the expected state is
529 * restored, not the drivers personal bookkeeping.
530 */
531 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200532 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
533 save_encoders[count++] = *encoder;
534 }
535
536 count = 0;
537 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
538 save_connectors[count++] = *connector;
539 }
540
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800541 save_set.crtc = set->crtc;
542 save_set.mode = &set->crtc->mode;
543 save_set.x = set->crtc->x;
544 save_set.y = set->crtc->y;
Matt Roperf4510a22014-04-01 15:22:40 -0700545 save_set.fb = set->crtc->primary->fb;
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800546
Dave Airlief453ba02008-11-07 14:05:41 -0800547 /* We should be able to check here if the fb has the same properties
548 * and then just flip_or_move it */
Matt Roperf4510a22014-04-01 15:22:40 -0700549 if (set->crtc->primary->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800550 /* If we have no fb then treat it as a full mode set */
Matt Roperf4510a22014-04-01 15:22:40 -0700551 if (set->crtc->primary->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800552 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800553 mode_changed = true;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100554 } else if (set->fb == NULL) {
555 mode_changed = true;
Laurent Pinchartce83adf2013-04-22 01:38:47 +0200556 } else if (set->fb->pixel_format !=
Matt Roperf4510a22014-04-01 15:22:40 -0700557 set->crtc->primary->fb->pixel_format) {
Laurent Pinchartce83adf2013-04-22 01:38:47 +0200558 mode_changed = true;
Dave Airlie8dff4742010-02-11 14:28:58 +1000559 } else
Jesse Barnes712531b2009-01-09 13:56:14 -0800560 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800561 }
562
563 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800564 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800565
566 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800567 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800568 drm_mode_debug_printmodeline(&set->crtc->mode);
569 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800570 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800571 }
572
573 /* a) traverse passed in connector list and get encoders for them */
574 count = 0;
575 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
576 struct drm_connector_helper_funcs *connector_funcs =
577 connector->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800578 new_encoder = connector->encoder;
579 for (ro = 0; ro < set->num_connectors; ro++) {
580 if (set->connectors[ro] == connector) {
581 new_encoder = connector_funcs->best_encoder(connector);
582 /* if we can't get an encoder for a connector
583 we are setting now - then fail */
584 if (new_encoder == NULL)
585 /* don't break so fail path works correct */
586 fail = 1;
Daniel Vetter25f397a2013-07-19 18:57:11 +0200587
588 if (connector->dpms != DRM_MODE_DPMS_ON) {
589 DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
590 mode_changed = true;
591 }
Daniel Vetter177cf922014-04-01 22:14:59 +0200592
593 break;
Dave Airlief453ba02008-11-07 14:05:41 -0800594 }
595 }
596
597 if (new_encoder != connector->encoder) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800598 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800599 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200600 /* If the encoder is reused for another connector, then
601 * the appropriate crtc will be set later.
602 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200603 if (connector->encoder)
604 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800605 connector->encoder = new_encoder;
606 }
607 }
608
609 if (fail) {
610 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200611 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800612 }
613
614 count = 0;
615 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
616 if (!connector->encoder)
617 continue;
618
Dave Airlief453ba02008-11-07 14:05:41 -0800619 if (connector->encoder->crtc == set->crtc)
620 new_crtc = NULL;
621 else
622 new_crtc = connector->encoder->crtc;
623
624 for (ro = 0; ro < set->num_connectors; ro++) {
625 if (set->connectors[ro] == connector)
626 new_crtc = set->crtc;
627 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800628
629 /* Make sure the new CRTC will work with the encoder */
630 if (new_crtc &&
631 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
632 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200633 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800634 }
Dave Airlief453ba02008-11-07 14:05:41 -0800635 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800636 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800637 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800638 connector->encoder->crtc = new_crtc;
639 }
Jerome Glisse94401062010-07-15 15:43:25 -0400640 if (new_crtc) {
641 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
Jani Nikula25933822014-06-03 14:56:20 +0300642 connector->base.id, connector->name,
Jerome Glisse94401062010-07-15 15:43:25 -0400643 new_crtc->base.id);
644 } else {
645 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
Jani Nikula25933822014-06-03 14:56:20 +0300646 connector->base.id, connector->name);
Jerome Glisse94401062010-07-15 15:43:25 -0400647 }
Dave Airlief453ba02008-11-07 14:05:41 -0800648 }
649
650 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800651 if (fb_changed && !crtc_funcs->mode_set_base)
652 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800653
Jesse Barnes712531b2009-01-09 13:56:14 -0800654 if (mode_changed) {
Ilija Hadzic48b1f5d2013-10-29 11:09:45 -0400655 if (drm_helper_crtc_in_use(set->crtc)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800656 DRM_DEBUG_KMS("attempting to set mode from"
657 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800658 drm_mode_debug_printmodeline(set->mode);
Matt Roperf4510a22014-04-01 15:22:40 -0700659 set->crtc->primary->fb = set->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800660 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500661 set->x, set->y,
Ilija Hadzicbec2eac2013-10-29 11:09:42 -0400662 save_set.fb)) {
Jerome Glisse94401062010-07-15 15:43:25 -0400663 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
664 set->crtc->base.id);
Matt Roperf4510a22014-04-01 15:22:40 -0700665 set->crtc->primary->fb = save_set.fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800666 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200667 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800668 }
Daniel Vetter25f397a2013-07-19 18:57:11 +0200669 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
670 for (i = 0; i < set->num_connectors; i++) {
671 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
Jani Nikula25933822014-06-03 14:56:20 +0300672 set->connectors[i]->name);
Daniel Vetter25f397a2013-07-19 18:57:11 +0200673 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
674 }
Dave Airlief453ba02008-11-07 14:05:41 -0800675 }
Daniel Vetterb182cc52014-03-20 14:26:34 +0100676 __drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800677 } else if (fb_changed) {
Ben Skeggs9b1596a2009-09-18 10:43:52 +1000678 set->crtc->x = set->x;
679 set->crtc->y = set->y;
Matt Roperf4510a22014-04-01 15:22:40 -0700680 set->crtc->primary->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000681 ret = crtc_funcs->mode_set_base(set->crtc,
Ilija Hadzicbec2eac2013-10-29 11:09:42 -0400682 set->x, set->y, save_set.fb);
Chris Wilson0ba41e42011-01-08 15:10:41 +0000683 if (ret != 0) {
Ilija Hadzicfbce4062013-10-29 11:09:43 -0400684 set->crtc->x = save_set.x;
685 set->crtc->y = save_set.y;
Matt Roperf4510a22014-04-01 15:22:40 -0700686 set->crtc->primary->fb = save_set.fb;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200687 goto fail;
Chris Wilson0ba41e42011-01-08 15:10:41 +0000688 }
Dave Airlief453ba02008-11-07 14:05:41 -0800689 }
690
Maarten Maathuise67aae72009-08-27 10:18:29 +0200691 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800692 kfree(save_encoders);
Dave Airlief453ba02008-11-07 14:05:41 -0800693 return 0;
694
Maarten Maathuise67aae72009-08-27 10:18:29 +0200695fail:
696 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800697 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200698 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
699 *encoder = save_encoders[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000700 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200701
Dave Airlief453ba02008-11-07 14:05:41 -0800702 count = 0;
703 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200704 *connector = save_connectors[count++];
Dave Airlief453ba02008-11-07 14:05:41 -0800705 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200706
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800707 /* Try to restore the config */
708 if (mode_changed &&
709 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
710 save_set.y, save_set.fb))
711 DRM_ERROR("failed to restore config after modeset failure\n");
712
Maarten Maathuise67aae72009-08-27 10:18:29 +0200713 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800714 kfree(save_encoders);
715 return ret;
716}
717EXPORT_SYMBOL(drm_crtc_helper_set_config);
718
Keith Packardc9fb15f2009-05-30 20:42:28 -0700719static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
720{
721 int dpms = DRM_MODE_DPMS_OFF;
722 struct drm_connector *connector;
723 struct drm_device *dev = encoder->dev;
724
725 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
726 if (connector->encoder == encoder)
727 if (connector->dpms < dpms)
728 dpms = connector->dpms;
729 return dpms;
730}
731
Sean Paul3b336ec2013-08-14 16:47:37 -0400732/* Helper which handles bridge ordering around encoder dpms */
733static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
734{
735 struct drm_bridge *bridge = encoder->bridge;
736 struct drm_encoder_helper_funcs *encoder_funcs;
737
738 if (bridge) {
739 if (mode == DRM_MODE_DPMS_ON)
740 bridge->funcs->pre_enable(bridge);
741 else
742 bridge->funcs->disable(bridge);
743 }
744
745 encoder_funcs = encoder->helper_private;
746 if (encoder_funcs->dpms)
747 encoder_funcs->dpms(encoder, mode);
748
749 if (bridge) {
750 if (mode == DRM_MODE_DPMS_ON)
751 bridge->funcs->enable(bridge);
752 else
753 bridge->funcs->post_disable(bridge);
754 }
755}
756
Keith Packardc9fb15f2009-05-30 20:42:28 -0700757static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
758{
759 int dpms = DRM_MODE_DPMS_OFF;
760 struct drm_connector *connector;
761 struct drm_device *dev = crtc->dev;
762
763 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
764 if (connector->encoder && connector->encoder->crtc == crtc)
765 if (connector->dpms < dpms)
766 dpms = connector->dpms;
767 return dpms;
768}
769
770/**
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100771 * drm_helper_connector_dpms() - connector dpms helper implementation
772 * @connector: affected connector
773 * @mode: DPMS mode
Keith Packardc9fb15f2009-05-30 20:42:28 -0700774 *
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100775 * This is the main helper function provided by the crtc helper framework for
776 * implementing the DPMS connector attribute. It computes the new desired DPMS
777 * state for all encoders and crtcs in the output mesh and calls the ->dpms()
778 * callback provided by the driver appropriately.
Keith Packardc9fb15f2009-05-30 20:42:28 -0700779 */
780void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
781{
782 struct drm_encoder *encoder = connector->encoder;
783 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
Sean Paul3b336ec2013-08-14 16:47:37 -0400784 int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700785
786 if (mode == connector->dpms)
787 return;
788
789 old_dpms = connector->dpms;
790 connector->dpms = mode;
791
Sean Paul3b336ec2013-08-14 16:47:37 -0400792 if (encoder)
793 encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
794
Keith Packardc9fb15f2009-05-30 20:42:28 -0700795 /* from off to on, do crtc then encoder */
796 if (mode < old_dpms) {
797 if (crtc) {
798 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
799 if (crtc_funcs->dpms)
800 (*crtc_funcs->dpms) (crtc,
801 drm_helper_choose_crtc_dpms(crtc));
802 }
Sean Paul3b336ec2013-08-14 16:47:37 -0400803 if (encoder)
804 drm_helper_encoder_dpms(encoder, encoder_dpms);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700805 }
806
807 /* from on to off, do encoder then crtc */
808 if (mode > old_dpms) {
Sean Paul3b336ec2013-08-14 16:47:37 -0400809 if (encoder)
810 drm_helper_encoder_dpms(encoder, encoder_dpms);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700811 if (crtc) {
812 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
813 if (crtc_funcs->dpms)
814 (*crtc_funcs->dpms) (crtc,
815 drm_helper_choose_crtc_dpms(crtc));
816 }
817 }
818
819 return;
820}
821EXPORT_SYMBOL(drm_helper_connector_dpms);
822
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100823/**
824 * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata
825 * @fb: drm_framebuffer object to fill out
826 * @mode_cmd: metadata from the userspace fb creation request
827 *
828 * This helper can be used in a drivers fb_create callback to pre-fill the fb's
829 * metadata fields.
830 */
Daniel Vetter9fd93782014-01-23 22:16:24 +0100831void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
832 struct drm_mode_fb_cmd2 *mode_cmd)
Dave Airlief453ba02008-11-07 14:05:41 -0800833{
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200834 int i;
835
Dave Airlief453ba02008-11-07 14:05:41 -0800836 fb->width = mode_cmd->width;
837 fb->height = mode_cmd->height;
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200838 for (i = 0; i < 4; i++) {
839 fb->pitches[i] = mode_cmd->pitches[i];
840 fb->offsets[i] = mode_cmd->offsets[i];
Rob Clarke3eb3252015-02-05 14:41:52 +0000841 fb->modifier[i] = mode_cmd->modifier[i];
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200842 }
Dave Airlie248dbc22011-11-29 20:02:54 +0000843 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
Jesse Barnes308e5bc2011-11-14 14:51:28 -0800844 &fb->bits_per_pixel);
845 fb->pixel_format = mode_cmd->pixel_format;
Fabien DESSENNEd980b182014-07-01 14:40:42 +0200846 fb->flags = mode_cmd->flags;
Dave Airlief453ba02008-11-07 14:05:41 -0800847}
848EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
849
Daniel Vetteraa4cd912014-01-22 16:42:02 +0100850/**
851 * drm_helper_resume_force_mode - force-restore mode setting configuration
852 * @dev: drm_device which should be restored
853 *
854 * Drivers which use the mode setting helpers can use this function to
855 * force-restore the mode setting configuration e.g. on resume or when something
856 * else might have trampled over the hw state (like some overzealous old BIOSen
857 * tended to do).
Daniel Vetter00d762c2014-01-23 22:28:30 +0100858 *
859 * This helper doesn't provide a error return value since restoring the old
860 * config should never fail due to resource allocation issues since the driver
861 * has successfully set the restored configuration already. Hence this should
862 * boil down to the equivalent of a few dpms on calls, which also don't provide
863 * an error code.
864 *
865 * Drivers where simply restoring an old configuration again might fail (e.g.
866 * due to slight differences in allocating shared resources when the
867 * configuration is restored in a different order than when userspace set it up)
868 * need to use their own restore logic.
Daniel Vetteraa4cd912014-01-22 16:42:02 +0100869 */
Daniel Vetter00d762c2014-01-23 22:28:30 +0100870void drm_helper_resume_force_mode(struct drm_device *dev)
Dave Airlief453ba02008-11-07 14:05:41 -0800871{
872 struct drm_crtc *crtc;
David John89347bb2009-12-31 12:00:46 +0530873 struct drm_encoder *encoder;
David John89347bb2009-12-31 12:00:46 +0530874 struct drm_crtc_helper_funcs *crtc_funcs;
Daniel Vetter00d762c2014-01-23 22:28:30 +0100875 int encoder_dpms;
876 bool ret;
Dave Airlief453ba02008-11-07 14:05:41 -0800877
Dave Airlie3ea87852014-03-21 10:45:40 +1000878 drm_modeset_lock_all(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800879 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
880
881 if (!crtc->enabled)
882 continue;
883
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500884 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
Matt Roperf4510a22014-04-01 15:22:40 -0700885 crtc->x, crtc->y, crtc->primary->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800886
Daniel Vetter00d762c2014-01-23 22:28:30 +0100887 /* Restoring the old config should never fail! */
Dave Airlief453ba02008-11-07 14:05:41 -0800888 if (ret == false)
889 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
David John89347bb2009-12-31 12:00:46 +0530890
891 /* Turn off outputs that were already powered off */
892 if (drm_helper_choose_crtc_dpms(crtc)) {
893 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
894
895 if(encoder->crtc != crtc)
896 continue;
897
Sean Paul3b336ec2013-08-14 16:47:37 -0400898 encoder_dpms = drm_helper_choose_encoder_dpms(
899 encoder);
900
901 drm_helper_encoder_dpms(encoder, encoder_dpms);
David John89347bb2009-12-31 12:00:46 +0530902 }
Chris Wilson817e6312010-08-06 15:03:31 +0100903
904 crtc_funcs = crtc->helper_private;
905 if (crtc_funcs->dpms)
906 (*crtc_funcs->dpms) (crtc,
907 drm_helper_choose_crtc_dpms(crtc));
David John89347bb2009-12-31 12:00:46 +0530908 }
Dave Airlief453ba02008-11-07 14:05:41 -0800909 }
Daniel Vetter00d762c2014-01-23 22:28:30 +0100910
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +0800911 /* disable the unused connectors while restoring the modesetting */
Daniel Vetterb182cc52014-03-20 14:26:34 +0100912 __drm_helper_disable_unused_functions(dev);
Dave Airlie3ea87852014-03-21 10:45:40 +1000913 drm_modeset_unlock_all(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800914}
915EXPORT_SYMBOL(drm_helper_resume_force_mode);
Daniel Vetter2f324b42014-10-29 11:13:47 +0100916
917/**
918 * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers
919 * @crtc: DRM CRTC
920 * @mode: DRM display mode which userspace requested
921 * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks
922 * @x: x offset of the CRTC scanout area on the underlying framebuffer
923 * @y: y offset of the CRTC scanout area on the underlying framebuffer
924 * @old_fb: previous framebuffer
925 *
926 * This function implements a callback useable as the ->mode_set callback
927 * required by the crtc helpers. Besides the atomic plane helper functions for
928 * the primary plane the driver must also provide the ->mode_set_nofb callback
929 * to set up the crtc.
930 *
931 * This is a transitional helper useful for converting drivers to the atomic
932 * interfaces.
933 */
934int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
935 struct drm_display_mode *adjusted_mode, int x, int y,
936 struct drm_framebuffer *old_fb)
937{
938 struct drm_crtc_state *crtc_state;
939 struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
940 int ret;
941
942 if (crtc->funcs->atomic_duplicate_state)
943 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
944 else if (crtc->state)
945 crtc_state = kmemdup(crtc->state, sizeof(*crtc_state),
946 GFP_KERNEL);
947 else
948 crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL);
949 if (!crtc_state)
950 return -ENOMEM;
Daniel Vetter07cc0ef2014-11-27 15:49:39 +0100951 crtc_state->crtc = crtc;
Daniel Vetter2f324b42014-10-29 11:13:47 +0100952
953 crtc_state->enable = true;
954 crtc_state->planes_changed = true;
Daniel Vetter623369e2014-09-16 17:50:47 +0200955 crtc_state->mode_changed = true;
Daniel Vetter2f324b42014-10-29 11:13:47 +0100956 drm_mode_copy(&crtc_state->mode, mode);
957 drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);
958
959 if (crtc_funcs->atomic_check) {
960 ret = crtc_funcs->atomic_check(crtc, crtc_state);
961 if (ret) {
962 kfree(crtc_state);
963
964 return ret;
965 }
966 }
967
968 swap(crtc->state, crtc_state);
969
970 crtc_funcs->mode_set_nofb(crtc);
971
972 if (crtc_state) {
973 if (crtc->funcs->atomic_destroy_state)
974 crtc->funcs->atomic_destroy_state(crtc, crtc_state);
975 else
976 kfree(crtc_state);
977 }
978
979 return drm_helper_crtc_mode_set_base(crtc, x, y, old_fb);
980}
981EXPORT_SYMBOL(drm_helper_crtc_mode_set);
982
983/**
984 * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers
985 * @crtc: DRM CRTC
986 * @x: x offset of the CRTC scanout area on the underlying framebuffer
987 * @y: y offset of the CRTC scanout area on the underlying framebuffer
988 * @old_fb: previous framebuffer
989 *
990 * This function implements a callback useable as the ->mode_set_base used
991 * required by the crtc helpers. The driver must provide the atomic plane helper
992 * functions for the primary plane.
993 *
994 * This is a transitional helper useful for converting drivers to the atomic
995 * interfaces.
996 */
997int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
998 struct drm_framebuffer *old_fb)
999{
1000 struct drm_plane_state *plane_state;
1001 struct drm_plane *plane = crtc->primary;
1002
1003 if (plane->funcs->atomic_duplicate_state)
1004 plane_state = plane->funcs->atomic_duplicate_state(plane);
1005 else if (plane->state)
Daniel Vetter321ebf02014-11-04 22:57:27 +01001006 plane_state = drm_atomic_helper_plane_duplicate_state(plane);
Daniel Vetter2f324b42014-10-29 11:13:47 +01001007 else
1008 plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
1009 if (!plane_state)
1010 return -ENOMEM;
Daniel Vetter07cc0ef2014-11-27 15:49:39 +01001011 plane_state->plane = plane;
Daniel Vetter2f324b42014-10-29 11:13:47 +01001012
1013 plane_state->crtc = crtc;
Daniel Vetter321ebf02014-11-04 22:57:27 +01001014 drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb);
Daniel Vetter2f324b42014-10-29 11:13:47 +01001015 plane_state->crtc_x = 0;
1016 plane_state->crtc_y = 0;
1017 plane_state->crtc_h = crtc->mode.vdisplay;
1018 plane_state->crtc_w = crtc->mode.hdisplay;
1019 plane_state->src_x = x << 16;
1020 plane_state->src_y = y << 16;
1021 plane_state->src_h = crtc->mode.vdisplay << 16;
1022 plane_state->src_w = crtc->mode.hdisplay << 16;
1023
1024 return drm_plane_helper_commit(plane, plane_state, old_fb);
1025}
1026EXPORT_SYMBOL(drm_helper_crtc_mode_set_base);